#4B378E
Closest named color: Dark Slate Blue (#483D8B). oklch(40.9% 0.138 289.5), rgb(75, 55, 142).
Aa
White text reads best on this color (9.39:1).
About this color
#4B378E is a dark, moderately saturated purple. In OKLCH its lightness is 41%, its chroma 0.138 and its hue 289°. Its hue sits on the cool side of the wheel. The nearest named color is Dark Slate Blue (#483D8B), ΔE 0.016 away. White text reads best on it, at 9.39:1.
| Hue family | Purples |
| Lightness | dark (41%) |
| Chroma | moderately saturated (0.138) |
| Temperature | cool |
| Nearest name | Dark Slate Blue (#483D8B) |
| Black text | 2.23:1 |
| White text | 9.39:1 |
Values
| HEX | #4B378E |
| RGB | rgb(75, 55, 142) |
| HSL | hsl(254, 44%, 39%) |
| OKLCH | oklch(40.9% 0.138 289.5) |
Contrast
WCAG 2 contrast ratios are the conformance target: AA needs 4.5:1 for body text and 3:1 for large text, AAA needs 7:1. APCA Lc values are supplementary guidance from the WCAG 3 drafts.
| Pair | WCAG 2 | Result | APCA | APCA guidance |
|---|---|---|---|---|
| White text on #4B378E | 9.39:1 | AAA | Lc -95.7 | Preferred for body text |
| Black text on #4B378E | 2.23:1 | Fails | Lc 12.6 | Not readable |
| #4B378E text on white | 9.39:1 | AAA | Lc 91.3 | Preferred for body text |
| #4B378E text on black | 2.23:1 | Fails | Lc -11.0 | Not readable |
Tints and shades
A 50–950 scale built in OKLCH: the hue is held, lightness follows a Tailwind v4-like curve, and every step is kept inside the sRGB gamut. This color sits at step 800.
-
Step 50
50
#F5F4FC
oklch(97% 0.011 292)
-
Step 100
100
#E9E8F9
oklch(93.7% 0.023 288.7)
-
Step 200
200
#D8D5F6
oklch(88.6% 0.045 289.6)
-
Step 300
300
#BFB8F2
oklch(80.8% 0.081 290)
-
Step 400
400
#9F92EB
oklch(70.7% 0.128 289.4)
-
Step 500
500
#8974E5
oklch(63.1% 0.165 289.4)
-
Step 600
600
#745AD3
oklch(55.6% 0.178 289.2)
-
Step 700
700
#6249B7
oklch(49.2% 0.166 289.3)
-
Step 800
800 (this color)
#4B378E
oklch(40.9% 0.138 289.5)
-
Step 900
900
#423576
oklch(37.8% 0.107 289.5)
-
Step 950
950
#261F45
oklch(26.9% 0.069 289.4)
#4B378E with color blindness
Simulated with the Machado et al. (2009) model. ΔE is how far the color moves: below about 0.02 you would not notice a change.
| Vision | Seen as | Shift (ΔE) |
|---|---|---|
| Protanopia (no red cones) | #004891 | 0.080 |
| Deuteranopia (no green cones) | #00448C | 0.080 |
| Tritanopia (no blue cones) | #364B5D | 0.113 |
| Achromatopsia (no color) | #464646 | 0.138 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #4B378E
#4B378E
oklch(40.9% 0.138 289.5)
- #4E4D00
#4E4D00
oklch(40.8% 0.088 108.9)
Analogous
Neighbouring hues, 30° either side.
Split complementary
The two hues beside the complement (150° and 210°).
Triadic
Three hues spaced 120° apart.
Palettes with this color
Curated palettes that contain a color within ΔE 0.04 (OKLab) of #4B378E, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Dark Slate Blue #483D8B ΔE 0.016
- Blueberry #464196 ΔE 0.027
- Rebecca Purple #663399 ΔE 0.053
- Cobalt #1E488F ΔE 0.068
- Twilight #4E518B ΔE 0.070
- Sapphire #2138AB ΔE 0.076
- Imperial Purple #480CA8 ΔE 0.077
- Chrysanthemum #560BAD ΔE 0.079
Use #4B378E in your product
Turn it into light and dark UI roles checked for contrast, then export to Tailwind v4, shadcn/ui, CSS or design tokens.